CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common stock	Paid-in capital	Retained earnings	Non controlling interest	Accum other comp loss	Series A preferred stock	Series B preferred stock
Beginning Balance at Dec. 31, 2017	$ 268,546	$ 174	$ 153,086	$ 134,193	$ 568	$ (19,491)	$ 1	$ 15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred dividends paid	(68)			(68)
Compensation expense for restricted stock	2,023		2,023
Tax related items for share based awards	(332)		(332)
Issuance of shares of common stock	894		894
Currency translation adjustment	1,880					1,880
Net income	24,419			24,510	(91)
Ending Balance at Sep. 30, 2018	297,362	174	155,671	158,635	477	(17,611)	1	15
Beginning Balance at Jun. 30, 2018	285,303	174	155,341	150,261	512	(21,001)	1	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred dividends paid	(23)			(23)
Compensation expense for restricted stock	526		526
Tax related items for share based awards	(196)		(196)
Currency translation adjustment	3,390					3,390
Net income	8,362			8,397	(35)
Ending Balance at Sep. 30, 2018	297,362	174	155,671	158,635	477	(17,611)	1	15
Beginning Balance at Dec. 31, 2018	308,254	174	156,190	169,735	1,406	(19,267)	1	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred dividends paid	(68)			(68)
Compensation expense for restricted stock	1,502		1,502
Tax related items for share based awards	(266)		(266)
Issuance of shares of common stock	0
Currency translation adjustment	(718)					(718)
Net income	33,687			33,859	(172)
Ending Balance at Sep. 30, 2019	342,391	174	157,426	203,526	1,234	(19,985)	1	15
Beginning Balance at Jun. 30, 2019	330,210	174	157,091	190,440	1,193	(18,704)	1	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred dividends paid	(23)			(23)
Compensation expense for restricted stock	473		473
Tax related items for share based awards	(138)		(138)
Issuance of shares of common stock	0
Currency translation adjustment	(1,281)					(1,281)
Net income	13,150			13,109	41
Ending Balance at Sep. 30, 2019	$ 342,391	$ 174	$ 157,426	$ 203,526	$ 1,234	$ (19,985)	$ 1	$ 15